A1240A-1TQG176C

Field Programmable Gate Array Overview

The A1240A-1TQG176C is a Field Programmable Gate Array (FPGA) belonging to the ACT 2 family, manufactured by Microsemi Corporation. It features an architecture with 1232 Configurable Logic Blocks (CLBs) and approximately 8000 logic gates, offering performance equivalent to up to 20,000 PLD gates. The device supports a maximum operating frequency of 75 MHz and includes up to 140 user-programmable I/O pins. It operates within a voltage range of 4.5 V to 5.5 V, with a nominal supply of 5 V. The component utilizes CMOS technology and is housed in a TQFP package.

Field Programmable Gate Array Feature Summary

• ACT 2 Architecture: Utilizes proprietary antifuse technology for non-volatile configuration, eliminating the need for external configuration memory.
• High Density Logic: Provides 1232 CLBs and extensive macro-function libraries, replacing hundreds of standard TTL or PAL packages.
• Wide-Input Combinatorial Functions: Supports complex logic implementation with wide-input capabilities for efficient decoding and control.
• Single-Module Sequence Functions: Integrated sequential logic elements allow for compact state machine and counter designs.

Field Programmable Gate Array Applications

• Complex digital logic replacement for legacy TTL/CMOS systems
• Prototyping and design verification for high-speed digital circuits
• Custom interface controllers and protocol converters
• Military and aerospace embedded logic applications requiring radiation tolerance

Field Programmable Gate Array Procurement Notes

Verify the specific suffix '1TQG176C' against official Microsemi documentation to confirm temperature grade and package variant, as generic listings may conflate it with other ACT 2 variants. Confirm end-of-life status and life-buy availability through authorized distributors, as this component is likely discontinued. Ensure compliance with export control regulations (ECCN) if applicable to your region.

Field Programmable Gate Array Selection Notes

Select the A1240A-1TQG176C when a non-volatile FPGA solution with moderate density (approx. 8000 gates) is required. Compare against the A1240A-VQ176B if a ceramic PGA package is preferred over the plastic TQFP. Consider the A1240XL series if higher performance (up to 160 MHz) and SRAM-based reprogrammability are needed, noting the trade-off in configuration complexity.

Field Programmable Gate Array Part Context

This part belongs to the Microsemi (formerly Actel) ACT 2 family, which was among the first commercial FPGAs using antifuse technology. These devices were widely adopted in military and industrial sectors for their inherent security and radiation hardness. The A1240A represents a mid-range density option within this legacy portfolio, bridging the gap between smaller PLDs and larger custom ASICs.

Field Programmable Gate Array Replacement Considerations

Direct pin-to-pin replacements are limited due to the niche nature of antifuse FPGAs. Potential alternatives include the A1240A-VQ176B (different package) or newer Microsemi SmartFusion or IGLOO families, though these require significant architectural redesign. Cross-reference with other manufacturers' dense CPLDs or FPGAs only if the antifuse advantage is not critical.